<div class="panel panel-primary">
    <div class="panel-heading">NgStyle用法</div>
    <div class="panel-body">
      <div [ngStyle]="currentStyles">
        用NgStyle批量修改内联样式！
      </div>
      <button class="btn btn-success" (click)="setCurrentStyles()">设置</button>
    </div>
  </div>
